src/view.cpp

   1 #include "view.h"
   2 #include "bufferbuilder.h"
   3 #include "screen.h"
   4 #include "profiler.h"
   5 #include "gl_core44.h"
   6
   7 #ifndef CONTROLPANEL_DISABLED
   8         #include "controlpanel.h"
   9 #endif //CONTROLPANEL_DISABLED
  10
  11
  12 #ifdef TRANSFORM_BEZIERS_TO_PATH
  13         #ifndef TRANSFORM_OBJECTS_NOT_VIEW
  14         //#error Cannot TRANSFORM_BEZIERS_TO_PATH _without_ TRANSFORM_OBJECTS_NOT_VIEW
  15         #endif
  16 #endif
  17
  18 using namespace IPDF;
  19 using namespace std;
  20
  21 /**
  22  * Constructs a view
  23  * Allocates memory for ObjectRenderers
  24  * @param document - The document to associate the View with
  25  * @param bounds - Initial bounds of the View
  26  * @param colour - Colour to use for rendering this view. TODO: Make sure this actually works, or just remove it
  27  */
  28 View::View(Document & document, Screen & screen, const VRect & bounds, const Colour & colour)
  29         : m_use_gpu_transform(false), m_use_gpu_rendering(USE_GPU_RENDERING), m_bounds_dirty(true), m_buffer_dirty(true),
  30                 m_render_dirty(true), m_document(document), m_screen(screen), m_cached_display(), m_bounds(bounds), m_colour(colour), m_bounds_ubo(),
  31                 m_objbounds_vbo(), m_object_renderers(NUMBER_OF_OBJECT_TYPES), m_cpu_rendering_pixels(NULL),
  32                 m_perform_shading(USE_SHADING), m_show_bezier_bounds(false), m_show_bezier_type(false),
  33                 m_show_fill_points(false), m_show_fill_bounds(false), m_lazy_rendering(true),
  34                 m_query_gpu_bounds_on_next_frame(NULL)
  35 {
  36         Debug("View Created - Bounds => {%s}", m_bounds.Str().c_str());
  37
  38         screen.SetView(this); // oh dear...
  39
  40
  41
  42         // Create ObjectRenderers - new's match delete's in View::~View
  43         //TODO: Don't forget to put new renderers here or things will be segfaultastic
  44         if (screen.Valid())
  45         {
  46                 m_object_renderers[RECT_FILLED] = new RectFilledRenderer();
  47                 m_object_renderers[RECT_OUTLINE] = new RectOutlineRenderer();
  48                 m_object_renderers[CIRCLE_FILLED] = new CircleFilledRenderer();
  49                 m_object_renderers[BEZIER] = new BezierRenderer();
  50                 m_object_renderers[PATH] = new PathRenderer();
  51         }
  52         else
  53         {
  54                 for (int i = RECT_FILLED; i <= PATH; ++i)
  55                         m_object_renderers[i] = new FakeRenderer();
  56         }
  57
  58         // To add rendering for a new type of object;
  59         // 1. Add enum to ObjectType in ipdf.h
  60         // 2. Implement class inheriting from ObjectRenderer using that type in objectrenderer.h and objectrenderer.cpp
  61         // 3. Add it here
  62         // 4. Profit
  63
  64
  65 #ifndef QUADTREE_DISABLED
  66         m_quadtree_max_depth = 2;
  67         m_current_quadtree_node = document.GetQuadTree().root_id;
  68 #endif
  69 }
  70
  71 /**
  72  * Destroy a view
  73  * Frees memory used by ObjectRenderers
  74  */
  75 View::~View()
  76 {
  77         for (unsigned i = 0; i < m_object_renderers.size(); ++i)
  78         {
  79                 delete m_object_renderers[i]; // delete's match new's in constructor
  80         }
  81         m_object_renderers.clear();
  82         delete [] m_cpu_rendering_pixels;
  83 }
  84
  85 /**
  86  * Translate the view
  87  * @param x, y - Amount to translate
  88  */
  89 void View::Translate(Real x, Real y)
  90 {
  91         PROFILE_SCOPE("View::Translate");
  92         if (!m_use_gpu_transform)
  93                 m_buffer_dirty = true;
  94         m_bounds_dirty = true;
  95         #ifdef TRANSFORM_OBJECTS_NOT_VIEW
  96         ObjectType type = NUMBER_OF_OBJECT_TYPES;
  97                 #ifdef TRANSFORM_BEZIERS_TO_PATH
  98                         type = PATH;
  99                 #endif
 100         m_document.TranslateObjects(-x, -y, type);
 101         #endif
 102         m_bounds.x += m_bounds.w*VReal(x);
 103         m_bounds.y += m_bounds.h*VReal(y);
 104         //Debug("View Bounds => %s", m_bounds.Str().c_str());
 105
 106
 107 }
 108
 109 /**
 110  * Set View bounds
 111  * @param bounds - New bounds
 112  */
 113 void View::SetBounds(const Rect & bounds)
 114 {
 115         #ifdef TRANSFORM_OBJECTS_NOT_VIEW
 116         ObjectType type = NUMBER_OF_OBJECT_TYPES;
 117         #ifdef TRANSFORM_BEZIERS_TO_PATH
 118                 type = PATH;
 119         #endif
 120         SVGMatrix transform = {Real(m_bounds.w)/bounds.w, 0, Real(m_bounds.x) - bounds.x, 0,Real(m_bounds.h)/bounds.h, Real(m_bounds.y) - bounds.y};
 121         m_document.TransformObjectBounds(transform, type);
 122         #endif
 123         m_bounds.x = bounds.x;
 124         m_bounds.y = bounds.y;
 125         m_bounds.w = bounds.w;
 126         m_bounds.h = bounds.h;
 127         if (!m_use_gpu_transform)
 128                 m_buffer_dirty = true;
 129         m_bounds_dirty = true;
 130 }
 131
 132 /**
 133  * Scale the View at a point
 134  * @param x, y - Coordinates to scale at (eg: Mouse cursor position)
 135  * @param scale_amount - Amount to scale by
 136  */
 137 void View::ScaleAroundPoint(Real x, Real y, Real scale_amount)
 138 {
 139         PROFILE_SCOPE("View::ScaleAroundPoint");
 140         // (x0, y0, w, h) -> (x*w - (x*w - x0)*s, y*h - (y*h - y0)*s, w*s, h*s)
 141         // x and y are coordinates in the window
 142         // Convert to local coords.
 143         if (!m_use_gpu_transform)
 144                 m_buffer_dirty = true;
 145         m_bounds_dirty = true;
 146
 147
 148         #ifdef TRANSFORM_OBJECTS_NOT_VIEW
 149         ObjectType type = NUMBER_OF_OBJECT_TYPES;
 150         #ifdef TRANSFORM_BEZIERS_TO_PATH
 151                 type = PATH;
 152         #endif
 153         m_document.ScaleObjectsAboutPoint(x, y, scale_amount, type);
 154         #endif
 155         VReal vx = m_bounds.w * VReal(x);
 156         VReal vy = m_bounds.h * VReal(y);
 157         vx += m_bounds.x;
 158         vy += m_bounds.y;
 159
 160         VReal top = vy - m_bounds.y;
 161         VReal left = vx - m_bounds.x;
 162
 163         top *= scale_amount;
 164         left *= scale_amount;
 165
 166         m_bounds.x = vx - left;
 167         m_bounds.y = vy - top;
 168         m_bounds.w *= scale_amount;
 169         m_bounds.h *= scale_amount;
 170         //Debug("Scale at {%s, %s} by %s View Bounds => %s", x.Str().c_str(), y.Str().c_str(), scale_amount.Str().c_str(), m_bounds.Str().c_str());
 171
 172
 173 }
 174
 175 /**
 176  * Transform a point in the document to a point relative to the top left corner of the view
 177  * This is the CPU coordinate transform code; used only if the CPU is doing coordinate transforms
 178  * @param inp - Input Rect {x,y,w,h} in the document
 179  * @returns output Rect {x,y,w,h} in the View
 180  */
 181 Rect View::TransformToViewCoords(const Rect& inp) const
 182 {
 183         #ifdef TRANSFORM_OBJECTS_NOT_VIEW
 184                 return inp;
 185         #endif
 186         return TransformRectCoordinates(m_bounds.Convert<Real>(), inp);
 187 }
 188
 189 /**
 190  * Render the view
 191  * Updates FrameBuffer if the document, object bounds, or view bounds have changed, then Blits it
 192  * Otherwise just Blits the cached FrameBuffer
 193  * @param width - Width of View to render
 194  * @param height - Height of View to render
 195  */
 196 void View::Render(int width, int height)
 197 {
 198         PROFILE_SCOPE("View::Render()");
 199         if (!m_screen.Valid()) return;
 200         glPushDebugGroup(GL_DEBUG_SOURCE_APPLICATION,42,-1, "Beginning View::Render()");
 201         // View dimensions have changed (ie: Window was resized)
 202         int prev_width = m_cached_display.GetWidth();
 203         int prev_height = m_cached_display.GetHeight();
 204         if (width != prev_width || height != prev_height)
 205         {
 206                 m_cached_display.Create(width, height);
 207                 m_bounds_dirty = true;
 208         }
 209
 210         // View bounds have not changed; blit the FrameBuffer as it is
 211         if (!m_bounds_dirty && m_lazy_rendering)
 212         {
 213                 m_cached_display.UnBind();
 214                 m_cached_display.Blit();
 215                 glPopDebugGroup();
 216                 return;
 217         }
 218         m_cached_display.Bind(); //NOTE: This is redundant; Clear already calls Bind
 219         m_cached_display.Clear();
 220
 221 #ifndef QUADTREE_DISABLED
 222         // I'm going to write this out in comments, so hopefully then I'll understand it. :/
 223         //
 224         // This code looks at the current bounds and tries to work out how they need to change
 225         // to keep the view looking at the correct quadtree node.
 226         //
 227         // The idea is that the width/height of the view bounds are always 0.5<=wh<=1.0. We then always
 228         // try to keep the bottom-right corner of the node on-screen, changing nodes to suit. Why bottom-right,
 229         // you may ask. It's an excellent question, with a dubious, hand-wavey answer: because we're manipulating
 230         // the bounds, it was easier to do it that way. (The top-left corner of the bounds are within the main
 231         // quadtree node).
 232         if (m_bounds_dirty || !m_lazy_rendering)
 233         {
 234                 g_profiler.BeginZone("View::Render -- Quadtree view bounds management");
 235                 // If we're too far zoomed out, become the parent of the current node.
 236                 if ( m_bounds.w > 1.0 || m_bounds.h > 1.0)
 237                 {
 238                         // If a parent node exists, we'll become it.
 239                         //TODO: Generate a new parent node if none exists, and work out when to change child_type
 240                         // away from QTC_UNKNOWN
 241                         if (m_document.GetQuadTree().nodes[m_current_quadtree_node].parent != QUADTREE_EMPTY)
 242                         {
 243                                 m_bounds = TransformFromQuadChild(m_bounds, m_document.GetQuadTree().nodes[m_current_quadtree_node].child_type);
 244                                 m_current_quadtree_node = m_document.GetQuadTree().nodes[m_current_quadtree_node].parent;
 245                         }
 246                 }
 247
 248                 // If we have a parent... (This prevents some crashes, but should disappear.)
 249                 if (m_document.GetQuadTree().nodes[m_current_quadtree_node].parent != QUADTREE_EMPTY)
 250                 {
 251                         // If the current node is off the left-hand side of the screen...
 252                         while (m_bounds.x > 1)
 253                         {
 254                                 //... the current node becomes the node to its right.
 255                                 m_bounds = Rect(m_bounds.x - 1, m_bounds.y, m_bounds.w, m_bounds.h);
 256                                 m_current_quadtree_node = m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 1, 0, &m_document);
 257                         }
 258                         while (m_bounds.y > 1)
 259                         {
 260                                 m_bounds = Rect(m_bounds.x, m_bounds.y - 1, m_bounds.w, m_bounds.h);
 261                                 m_current_quadtree_node = m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 0, 1, &m_document);
 262                         }
 263                         while (m_bounds.x < 0)
 264                         {
 265                                 m_bounds = Rect(m_bounds.x + 1, m_bounds.y, m_bounds.w, m_bounds.h);
 266                                 m_current_quadtree_node = m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, -1, 0, &m_document);
 267                         }
 268                         while (m_bounds.y < 0)
 269                         {
 270                                 m_bounds = Rect(m_bounds.x, m_bounds.y + 1, m_bounds.w, m_bounds.h);
 271                                 m_current_quadtree_node = m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 0, -1, &m_document);
 272                         }
 273                 }
 274
 275                 // Recurse into a node if we are completely within it. (If we're okay with having an invalid frame or two, we can remove this.)
 276                 if (ContainedInQuadChild(m_bounds, QTC_TOP_LEFT))
 277                 {
 278                         if (m_document.GetQuadTree().nodes[m_current_quadtree_node].top_left == QUADTREE_EMPTY)
 279                         {
 280                                 // We want to reparent into a child node, but none exist. Get the document to create one.
 281                                 m_document.GenQuadChild(m_current_quadtree_node, QTC_TOP_LEFT);
 282                                 m_render_dirty = true;
 283                         }
 284                         m_bounds = TransformToQuadChild(m_bounds, QTC_TOP_LEFT);
 285                         m_current_quadtree_node = m_document.GetQuadTree().nodes[m_current_quadtree_node].top_left;
 286                 }
 287                 if (ContainedInQuadChild(m_bounds, QTC_TOP_RIGHT))
 288                 {
 289                         if (m_document.GetQuadTree().nodes[m_current_quadtree_node].top_right == QUADTREE_EMPTY)
 290                         {
 291                                 // We want to reparent into a child node, but none exist. Get the document to create one.
 292                                 m_document.GenQuadChild(m_current_quadtree_node, QTC_TOP_RIGHT);
 293                                 m_render_dirty = true;
 294                         }
 295                         m_bounds = TransformToQuadChild(m_bounds, QTC_TOP_RIGHT);
 296                         m_current_quadtree_node = m_document.GetQuadTree().nodes[m_current_quadtree_node].top_right;
 297                 }
 298                 if (ContainedInQuadChild(m_bounds, QTC_BOTTOM_LEFT))
 299                 {
 300                         if (m_document.GetQuadTree().nodes[m_current_quadtree_node].bottom_left == QUADTREE_EMPTY)
 301                         {
 302                                 // We want to reparent into a child node, but none exist. Get the document to create one.
 303                                 m_document.GenQuadChild(m_current_quadtree_node, QTC_BOTTOM_LEFT);
 304                                 m_render_dirty = true;
 305                         }
 306                         m_bounds = TransformToQuadChild(m_bounds, QTC_BOTTOM_LEFT);
 307                         m_current_quadtree_node = m_document.GetQuadTree().nodes[m_current_quadtree_node].bottom_left;
 308                 }
 309                 if (ContainedInQuadChild(m_bounds, QTC_BOTTOM_RIGHT))
 310                 {
 311                         if (m_document.GetQuadTree().nodes[m_current_quadtree_node].bottom_right == QUADTREE_EMPTY)
 312                         {
 313                                 // We want to reparent into a child node, but none exist. Get the document to create one.
 314                                 m_document.GenQuadChild(m_current_quadtree_node, QTC_BOTTOM_RIGHT);
 315                                 m_render_dirty = true;
 316                         }
 317                         m_bounds = TransformToQuadChild(m_bounds, QTC_BOTTOM_RIGHT);
 318                         m_current_quadtree_node = m_document.GetQuadTree().nodes[m_current_quadtree_node].bottom_right;
 319                 }
 320
 321                 // Otherwise, we'll arbitrarily select the bottom-right.
 322                 // TODO: Perhaps select based on greatest area?
 323                 if (m_bounds.w < 0.5 || m_bounds.h < 0.5)
 324                 {
 325                         if (m_document.GetQuadTree().nodes[m_current_quadtree_node].bottom_right == QUADTREE_EMPTY)
 326                         {
 327                                 // We want to reparent into a child node, but none exist. Get the document to create one.
 328                                 m_document.GenQuadChild(m_current_quadtree_node, QTC_BOTTOM_RIGHT);
 329                                 m_render_dirty = true;
 330                         }
 331                         m_bounds = TransformToQuadChild(m_bounds, QTC_BOTTOM_RIGHT);
 332                         m_current_quadtree_node = m_document.GetQuadTree().nodes[m_current_quadtree_node].bottom_right;
 333                 }
 334                 g_profiler.EndZone();
 335         }
 336
 337         m_screen.DebugFontPrintF("Current View QuadTree");
 338         QuadTreeIndex overlay = m_current_quadtree_node;
 339         while (overlay != -1)
 340         {
 341                 m_screen.DebugFontPrintF(" Node: %d (objs: %d -> %d)", overlay, m_document.GetQuadTree().nodes[overlay].object_begin,
 342                                         m_document.GetQuadTree().nodes[overlay].object_end);
 343                 overlay = m_document.GetQuadTree().nodes[overlay].next_overlay;
 344         }
 345         m_screen.DebugFontPrintF("\n");
 346         m_screen.DebugFontPrintF("Left: %d, Right: %d, Up: %d, Down: %d\n",
 347                         m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, -1, 0, 0),
 348                         m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 1, 0, 0),
 349                         m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 0, -1, 0),
 350                         m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 0, 1, 0));
 351
 352
 353         Rect view_top_bounds = m_bounds;
 354         QuadTreeIndex tmp = m_current_quadtree_node;
 355         while (tmp != -1)
 356         {
 357                 view_top_bounds = TransformFromQuadChild(view_top_bounds, m_document.GetQuadTree().nodes[tmp].child_type);
 358                 tmp = m_document.GetQuadTree().nodes[tmp].parent;
 359         }
 360         m_screen.DebugFontPrintF("Equivalent View Bounds: %s\n", view_top_bounds.Str().c_str());
 361 #endif
 362
 363         if (!m_use_gpu_rendering)
 364         {
 365                 // Dynamically resize CPU rendering target pixels if needed
 366                 if (m_cpu_rendering_pixels == NULL || width*height > prev_width*prev_height)
 367                 {
 368                         delete [] m_cpu_rendering_pixels;
 369                         m_cpu_rendering_pixels = new uint8_t[width*height*4];
 370                         if (m_cpu_rendering_pixels == NULL)
 371                                 Fatal("Could not allocate %d*%d*4 = %d bytes for cpu rendered pixels", width, height, width*height*4);
 372                 }
 373                 // Clear CPU rendering pixels
 374                 for (int i = 0; i < width*height*4; ++i)
 375                         m_cpu_rendering_pixels[i] = 255;
 376         }
 377 #ifdef QUADTREE_DISABLED
 378         RenderRange(width, height, 0, m_document.ObjectCount());
 379 #else
 380         RenderQuadtreeNode(width, height, m_current_quadtree_node, m_quadtree_max_depth);
 381 #endif
 382         if (!m_use_gpu_rendering)
 383         {
 384                 m_screen.RenderPixels(0,0,width, height, m_cpu_rendering_pixels); //TODO: Make this work :(
 385                 // Debug for great victory (do something similar for GPU and compare?)
 386                 //ObjectRenderer::SaveBMP({m_cpu_rendering_pixels, width, height}, "cpu_rendering_last_frame.bmp");
 387         }
 388         m_cached_display.UnBind(); // resets render target to the screen
 389         m_cached_display.Blit(); // blit FrameBuffer to screen
 390         m_buffer_dirty = false;
 391         glPopDebugGroup();
 392
 393 #ifndef CONTROLPANEL_DISABLED
 394         // The powers that be suggest that this may be causing of the segfaults.
 395         //ControlPanel::Update();
 396 #endif //CONTROLPANEL_DISABLED
 397         //Debug("Completed Render");
 398
 399 }
 400
 401 #ifndef QUADTREE_DISABLED
 402 void View::RenderQuadtreeNode(int width, int height, QuadTreeIndex node, int remaining_depth)
 403 {
 404         Rect old_bounds = m_bounds;
 405         if (node == QUADTREE_EMPTY) return;
 406         if (!remaining_depth) return;
 407         //Debug("Rendering QT node %d, (objs: %d -- %d)\n", node, m_document.GetQuadTree().nodes[node].object_begin, m_document.GetQuadTree().nodes[node].object_end);
 408         m_bounds_dirty = true;
 409         m_render_dirty = m_buffer_dirty = true;
 410         QuadTreeIndex overlay = node;
 411         while(overlay != -1)
 412         {
 413                 RenderRange(width, height, m_document.GetQuadTree().nodes[overlay].object_begin, m_document.GetQuadTree().nodes[overlay].object_end);
 414                 overlay = m_document.GetQuadTree().nodes[overlay].next_overlay;
 415         }
 416
 417         if (m_bounds.Intersects(Rect(1,1,1,1)))
 418         {
 419                 m_bounds = Rect(m_bounds.x - 1, m_bounds.y - 1, m_bounds.w, m_bounds.h);
 420                 m_bounds_dirty = true;
 421                 RenderQuadtreeNode(width, height, m_document.GetQuadTree().GetNeighbour(node, 1, 1, &m_document), remaining_depth - 1);
 422         }
 423         m_bounds = old_bounds;
 424         if (m_bounds.Intersects(Rect(1,0,1,1)))
 425         {
 426                 m_bounds = Rect(m_bounds.x - 1, m_bounds.y, m_bounds.w, m_bounds.h);
 427                 m_bounds_dirty = true;
 428                 RenderQuadtreeNode(width, height, m_document.GetQuadTree().GetNeighbour(node, 1, 0, &m_document), remaining_depth - 1);
 429         }
 430         m_bounds = old_bounds;
 431         if (m_bounds.Intersects(Rect(0,1,1,1)))
 432         {
 433                 m_bounds = Rect(m_bounds.x, m_bounds.y - 1, m_bounds.w, m_bounds.h);
 434                 m_bounds_dirty = true;
 435                 RenderQuadtreeNode(width, height, m_document.GetQuadTree().GetNeighbour(node, 0, 1, &m_document), remaining_depth - 1);
 436         }
 437         m_bounds = old_bounds;
 438         m_bounds_dirty = true;
 439
 440 #if 0
 441         m_bounds = TransformToQuadChild(old_bounds, QTC_TOP_LEFT);
 442         m_bounds_dirty = true;
 443         RenderQuadtreeNode(width, height, m_document.GetQuadTree().nodes[node].top_left, remaining_depth-1);
 444         m_bounds = TransformToQuadChild(old_bounds, QTC_TOP_RIGHT);
 445         m_bounds_dirty = true;
 446         RenderQuadtreeNode(width, height, m_document.GetQuadTree().nodes[node].top_right, remaining_depth-1);
 447         m_bounds = TransformToQuadChild(old_bounds, QTC_BOTTOM_LEFT);
 448         m_bounds_dirty = true;
 449         RenderQuadtreeNode(width, height, m_document.GetQuadTree().nodes[node].bottom_left, remaining_depth-1);
 450         m_bounds = TransformToQuadChild(old_bounds, QTC_BOTTOM_RIGHT);
 451         m_bounds_dirty = true;
 452         RenderQuadtreeNode(width, height, m_document.GetQuadTree().nodes[node].bottom_right, remaining_depth-1);
 453         m_bounds = old_bounds;
 454         m_bounds_dirty = true;
 455 #endif
 456 }
 457 #endif
 458
 459 void View::RenderRange(int width, int height, unsigned first_obj, unsigned last_obj)
 460 {
 461         PROFILE_SCOPE("View::RenderRange");
 462         glPushDebugGroup(GL_DEBUG_SOURCE_APPLICATION, 43, -1, "View::RenderRange()");
 463         if (m_render_dirty) // document has changed
 464                 PrepareRender();
 465
 466         if (m_buffer_dirty || m_bounds_dirty || !m_lazy_rendering) // object bounds have changed
 467         {
 468                 if (m_use_gpu_rendering)
 469                         UpdateObjBoundsVBO(first_obj, last_obj);
 470         }
 471
 472         if (m_use_gpu_transform)
 473         {
 474                 #ifdef TRANSFORM_OBJECTS_NOT_VIEW
 475                         //Debug("Transform objects, not view");
 476                                 GLfloat glbounds[] = {0.0f, 0.0f, 1.0f, 1.0f,
 477                                         0.0f, 0.0f, float(width), float(height)};
 478                 #else
 479                 GLfloat glbounds[] = {static_cast<GLfloat>(Float(m_bounds.x)), static_cast<GLfloat>(Float(m_bounds.y)), static_cast<GLfloat>(Float(m_bounds.w)), static_cast<GLfloat>(Float(m_bounds.h)),
 480                                         0.0, 0.0, static_cast<GLfloat>(width), static_cast<GLfloat>(height)};
 481                 #endif
 482                 m_bounds_ubo.Upload(sizeof(float)*8, glbounds);
 483         }
 484         else
 485         {
 486                 GLfloat glbounds[] = {0.0f, 0.0f, 1.0f, 1.0f,
 487                                         0.0f, 0.0f, float(width), float(height)};
 488                 m_bounds_ubo.Upload(sizeof(float)*8, glbounds);
 489         }
 490         m_bounds_dirty = false;
 491
 492
 493         // Render using GPU
 494         if (m_use_gpu_rendering)
 495         {
 496                 if (m_colour.a < 1.0f)
 497                 {
 498                         glEnable(GL_BLEND);
 499                         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 500                 }
 501                 m_objbounds_vbo.Bind();
 502                 m_bounds_ubo.Bind();
 503                 glEnableVertexAttribArray(0);
 504                 glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, 0);
 505
 506                 for (unsigned i = 0; i < m_object_renderers.size(); ++i)
 507                 {
 508                         m_object_renderers[i]->RenderUsingGPU(first_obj, last_obj);
 509                 }
 510
 511                 glDisableVertexAttribArray(0);
 512                 if (m_colour.a < 1.0f)
 513                 {
 514                         glDisable(GL_BLEND);
 515                 }
 516         }
 517         else // Rasterise on CPU then blit texture to GPU
 518         {
 519
 520                 for (unsigned i = 0; i < m_object_renderers.size(); ++i)
 521                 {
 522                         m_object_renderers[i]->RenderUsingCPU(m_document.m_objects, *this, {m_cpu_rendering_pixels, width, height}, first_obj, last_obj);
 523                 }
 524         }
 525         glPopDebugGroup();
 526 }
 527
 528 void View::UpdateObjBoundsVBO(unsigned first_obj, unsigned last_obj)
 529 {
 530         PROFILE_SCOPE("View::UpdateObjBoundsVBO");
 531         if (m_query_gpu_bounds_on_next_frame != NULL)
 532         {
 533                 fprintf(m_query_gpu_bounds_on_next_frame,"# View: %s\t%s\t%s\t%s", Str(m_bounds.x).c_str(), Str(m_bounds.y).c_str(), Str(m_bounds.w).c_str(), Str(m_bounds.h).c_str());
 534         }
 535
 536         //m_objbounds_vbo.Invalidate();
 537         m_objbounds_vbo.SetType(GraphicsBuffer::BufferTypeVertex);
 538         m_objbounds_vbo.SetName("Object Bounds VBO");
 539
 540         #ifndef TRANSFORM_OBJECTS_NOT_VIEW
 541         if (m_use_gpu_transform)
 542         {
 543                 m_objbounds_vbo.SetUsage(GraphicsBuffer::BufferUsageStaticDraw);
 544         }
 545         else
 546         #endif //TRANSFORM_OBJECTS_NOT_VIEW
 547         {
 548                 m_objbounds_vbo.SetUsage(GraphicsBuffer::BufferUsageDynamicCopy);
 549         }
 550         m_objbounds_vbo.Resize(m_document.ObjectCount()*sizeof(GPUObjBounds));
 551
 552         BufferBuilder<GPUObjBounds> obj_bounds_builder(m_objbounds_vbo.MapRange(first_obj*sizeof(GPUObjBounds), (last_obj-first_obj)*sizeof(GPUObjBounds), false, true, true), m_objbounds_vbo.GetSize());
 553
 554         #ifndef TRANSFORM_BEZIERS_TO_PATH
 555         for (unsigned id = first_obj; id < last_obj; ++id)
 556         {
 557                 Rect obj_bounds;
 558                 if (m_use_gpu_transform)
 559                 {
 560                         obj_bounds = m_document.m_objects.bounds[id];
 561                 }
 562                 else
 563                 {
 564                         obj_bounds = TransformToViewCoords(m_document.m_objects.bounds[id]);
 565                 }
 566                 GPUObjBounds gpu_bounds = {
 567                         Float(obj_bounds.x),
 568                         Float(obj_bounds.y),
 569                         Float(obj_bounds.x + obj_bounds.w),
 570                         Float(obj_bounds.y + obj_bounds.h)
 571                 };
 572
 573                 if (m_query_gpu_bounds_on_next_frame != NULL)
 574                 {
 575                         fprintf(m_query_gpu_bounds_on_next_frame,"%d\t%f\t%f\t%f\t%f\n", id, Float(obj_bounds.x), Float(obj_bounds.y), Float(obj_bounds.w), Float(obj_bounds.h));
 576                 }
 577
 578                 obj_bounds_builder.Add(gpu_bounds);
 579         }
 580         #else
 581         for (unsigned i = 0; i < m_document.m_objects.paths.size(); ++i)
 582         {
 583                 Path & path = m_document.m_objects.paths[i];
 584                 Rect & pbounds = path.GetBounds(m_document.m_objects); // Not very efficient...
 585                 //TODO: Add clipping here
 586                 //if (!pbounds.Intersects(Rect(0,0,1,1)) || pbounds.w < Real(1)/Real(800))
 587                 //      continue;
 588
 589                 for (unsigned id = path.m_start; id <= path.m_end; ++id)
 590                 {
 591                         if (id < first_obj || id >= last_obj)
 592                                 continue;
 593
 594                         Rect obj_bounds = m_document.m_objects.bounds[id];
 595
 596                         obj_bounds.x *= pbounds.w;
 597                         obj_bounds.x += pbounds.x;
 598                         obj_bounds.y *= pbounds.h;
 599                         obj_bounds.y += pbounds.y;
 600                         obj_bounds.w *= pbounds.w;
 601                         obj_bounds.h *= pbounds.h;
 602
 603                         if (!m_use_gpu_transform)
 604                                 obj_bounds = TransformToViewCoords(obj_bounds);
 605                         GPUObjBounds gpu_bounds = {
 606                                 ClampFloat(obj_bounds.x),
 607                                 ClampFloat(obj_bounds.y),
 608                                 ClampFloat(obj_bounds.x + obj_bounds.w),
 609                                 ClampFloat(obj_bounds.y + obj_bounds.h)
 610                         };
 611                         obj_bounds_builder.Add(gpu_bounds);
 612                         //Debug("Path %d %s -> %s via %s", id, m_document.m_objects.bounds[id].Str().c_str(), obj_bounds.Str().c_str(), pbounds.Str().c_str());
 613
 614                         if (m_query_gpu_bounds_on_next_frame != NULL)
 615                         {
 616                                 fprintf(m_query_gpu_bounds_on_next_frame,"%d\t%f\t%f\t%f\t%f\n", id, ClampFloat(obj_bounds.x), ClampFloat(obj_bounds.y), ClampFloat(obj_bounds.w), ClampFloat(obj_bounds.h));
 617                         }
 618                 }
 619                 GPUObjBounds p_gpu_bounds = {
 620                                 ClampFloat(pbounds.x),
 621                                 ClampFloat(pbounds.y),
 622                                 ClampFloat(pbounds.x + pbounds.w),
 623                                 ClampFloat(pbounds.y + pbounds.h)
 624                 };
 625                 obj_bounds_builder.Add(p_gpu_bounds);
 626         }
 627         #endif
 628         if (m_query_gpu_bounds_on_next_frame != NULL)
 629         {
 630                 if (m_query_gpu_bounds_on_next_frame != stdout && m_query_gpu_bounds_on_next_frame != stderr)
 631                         fclose(m_query_gpu_bounds_on_next_frame);
 632                 m_query_gpu_bounds_on_next_frame = NULL;
 633         }
 634         m_objbounds_vbo.UnMap();
 635 }
 636 /**
 637  * Prepare the document for rendering
 638  * Will be called on View::Render if m_render_dirty is set
 639  * (Called at least once, on the first Render)
 640  */
 641 void View::PrepareRender()
 642 {
 643         PROFILE_SCOPE("View::PrepareRender()");
 644         Debug("Recreate buffers with %u objects", m_document.ObjectCount());
 645         // Prepare bounds vbo
 646         if (UsingGPURendering())
 647         {
 648                 m_bounds_ubo.Invalidate();
 649                 m_bounds_ubo.SetType(GraphicsBuffer::BufferTypeUniform);
 650                 m_bounds_ubo.SetUsage(GraphicsBuffer::BufferUsageStreamDraw);
 651                 m_bounds_ubo.SetName("m_bounds_ubo: Screen bounds.");
 652         }
 653
 654         // Instead of having each ObjectRenderer go through the whole document
 655         //  we initialise them, go through the document once adding to the appropriate Renderers
 656         //  and then finalise them
 657         // This will totally be efficient if we have like, a lot of distinct ObjectTypes. Which could totally happen. You never know.
 658
 659         // Prepare the buffers
 660         for (unsigned i = 0; i < m_object_renderers.size(); ++i)
 661         {
 662                 m_object_renderers[i]->PrepareBuffers(m_document.ObjectCount());
 663         }
 664
 665         // Add objects from Document to buffers
 666         for (unsigned id = 0; id < m_document.ObjectCount(); ++id)
 667         {
 668                 ObjectType type = m_document.m_objects.types[id];
 669                 m_object_renderers.at(type)->AddObjectToBuffers(id); // Use at() in case the document is corrupt TODO: Better error handling?
 670                 // (Also, Wow I just actually used std::vector::at())
 671                 // (Also, I just managed to make it throw an exception because I'm a moron)
 672                 //Debug("Object of type %d", type);
 673         }
 674
 675
 676         // Finish the buffers
 677         for (unsigned i = 0; i < m_object_renderers.size(); ++i)
 678         {
 679                 m_object_renderers[i]->FinaliseBuffers();
 680         }
 681         if (UsingGPURendering())
 682         {
 683                 dynamic_cast<BezierRenderer*>(m_object_renderers[BEZIER])->PrepareBezierGPUBuffer(m_document.m_objects);
 684         }
 685         m_render_dirty = false;
 686 }
 687
 688 void View::SaveCPUBMP(const char * filename)
 689 {
 690         bool prev = UsingGPURendering();
 691         SetGPURendering(false);
 692         Render(800, 600);
 693         ObjectRenderer::SaveBMP({m_cpu_rendering_pixels, 800, 600}, filename);
 694         SetGPURendering(prev);
 695 }
 696
 697 void View::SaveGPUBMP(const char * filename)
 698 {
 699         bool prev = UsingGPURendering();
 700         SetGPURendering(true);
 701         Render(800,600);
 702         m_screen.ScreenShot(filename);
 703         SetGPURendering(prev);
 704 }
 705
 706 void View::QueryGPUBounds(const char * filename, const char * mode)
 707 {
 708         m_query_gpu_bounds_on_next_frame = fopen(filename, mode);
 709         Debug("File: %s", filename);
 710         if (m_query_gpu_bounds_on_next_frame == NULL)
 711                 Error("Couldn't open file \"%s\" : %s", filename, strerror(errno));
 712         ForceBoundsDirty();
 713         ForceBufferDirty();
 714         ForceRenderDirty();
 715 }